What will fit?

[thirdstreettito]

I keep looking at tires for my K10 and keep forgetting to ask questions. Will an 11.5" tire fit on an 8" wheel? If not how much does it usually cost to have wheels widened?

[72 CustomCamper]

I am running 32/11.5/15's on stock 15x8 inch rallies on my 4x4. No problems at all...


Chuck

[Dooley]

Been running 33-12.50/15 on stock 8" wheels for over 30 years with no problems.

[thirdstreettito]

Wow, 12.5's on 8"? I didnt think that would work. Thanks guys! You really helped me out!

[Prerunner1982]

The rule of thumb is 4" difference between wheel width and tire width. It's not so much that something wider won't work, it will just wear more in the center of the tread.

[thirdstreettito]

Originally Posted by Prerunner1982

The rule of thumb is 4" difference between wheel width and tire width. It's not so much that something wider won't work, it will just wear more in the center of the tread.

Really? Darn.

[Dooley]

Originally Posted by thirdstreettito

Really? Darn.

Never any tire wear problems with my 33-12.50/15 on 8" wheels. Always wore even with proper tire pressure for empty/loaded weight. People that wear the middle out sooner are running too much air.

[thirdstreettito]

Originally Posted by Dooley

Never any tire wear problems with my 33-12.50/15 on 8" wheels. Always wore even with proper tire pressure for empty/loaded weight. People that wear the middle out sooner are running too much air.

What would those tire pressures be? I always run my tires at about 3psi below max psi.

[OrangeAnimal]

I can tell you a good way to figure out how much air to put in them when you get them on the truck. It's a old trick but still works good.

First you need some Talc powder aka baby powder. Then a good clean patch of driveway. Asphalt works best though. Shows up better and transfers better. Basically put some on the tire and then drive forward. If it leaves a good print down of all the tread then you have good air pressure. Also if it looks alittle flat when you are done don't worry about it.

More than likely you will still end up pretty close to what the factory states. I would start around 30 psi all the way around and go from there. It will be easier to start low and then go up until the edges don't touch. Then go back down till they did.

[LONGHAIR]

Just be aware that with a rough treaded "mud" type tire, you need to run a little more pressure than what this kind of testing will show. This is even more important with the big bias-ply tires. If the outer lugs touch the ground while you are running in a straight line, the caster (tilt) leans the tire into the turns, this causes the familiar "saw-tooth" wear.
It is ok to run the rears "flat" on the road, but the fronts need some "crown" across the tread.
It will probably take less air pressure than you think. The tire manufacturer's ratings are based upon "Max"....that is maximum pressure, which is required to carry it's maximum rated load.

You can always "air-down" for off-roading.....and back up for the highway.

[Dooley]

Originally Posted by thirdstreettito

What would those tire pressures be? I always run my tires at about 3psi below max psi.

I mostly run 35 in the front and 30/31 in the rear empty weight on the pickups. I increase rear pressures when loaded/towing. I ran 35 all around on the Suburban 4x4's. I have run BFG Muds since the middle 80's, Armstrong Tru-Tracs before that.